Personalized Mechanical Engineer Gear T-Shirt. Mechanical Engineer text on a gear for the engineer whose mental gears are always turning out new and better ideas. A unique gift design for mechanical engineers and engineering students at back to school, birthdays, holidays or graduation. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.